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Carbonyl and sulfhydryl groups of chicken meat proteins after dietary modulation with selenium

100%

Korzeniowska M. , Króliczewska B. , Kopeć W.

2015

tom 13

nr 1

The objective of the study was to investigate the effects of selenium modulation on the alteration of carbonyl and sulfhydryl groups in proteins in chicken breast and leg meat. Selenium, in the form of sodium selenite and selenized yeast, was applied to broiler chicken at 0.26, 0.38 and 0.50 mg Se kg-1. The alteration of protein carbonyl and sulfhydryl groups, as well as total antioxidative potential of breast and leg meat were analyzed in fresh, chilled and frozen material. Protein reactive groups were effectively protected against oxidatively induced changes (carbonyl groups formation) by dietary selenium supplementation, during frozen storage of both types of chicken muscles, either with white fibre domination (breast) or with red fibre domination (leg). The inorganic form of selenium was effective in decreasing the loss of protein sulfhydryl groups in muscles with red fibre domination during frozen storage. In conclusion, selenium compounds can be used in broiler nutrition as a protein antioxidizing agent, especially in perspective of the long storage of meat under freezing conditions.